EP0124196A2

EP0124196A2 - Plane shut double sliding door rail device

Info

Publication number: EP0124196A2
Application number: EP84300655A
Authority: EP
Inventors: Kazuhiko Sakamoto
Original assignee: Sugatsune Kogyo Co Ltd
Current assignee: Sugatsune Kogyo Co Ltd
Priority date: 1983-02-02
Filing date: 1984-02-02
Publication date: 1984-11-07
Also published as: US4565031A; DE3472996D1; EP0124196A3; EP0124196B1

Abstract

A plane shut double sliding door drain device comprises a door rail laid on an upper wall for rightside and leftside double sliding doors and a door rail laid on a lower wall for the double sliding doors, of a door mounting frame to laterally movably guide rightside and leftside doors via runners such as rollers provided at upper and lower ends of the both rightside and leftside sliding doors. The door rails each has at both rightside and leftside thereof an oblique portion bent backwardly, a rail switching portion and a guide portion in such a manner that one door can be shifted beforehand to switch the rail. Thus, the double sliding doors can be fulled closed without a gap between the sliding doors with only one rail without necessity of chamfering the inner ends of the doors in a readily mountable state inexpensively.

Description

This invention relates to an outset and inset plane shut double sliding door rail device in which at least double sliding doors are butted at the inner edge sides thereof in an opening of a cabinet or the like in planarly shut state in such a manner that one door can be shifted from the planarly shut state to be slidably superposed at the beforehand side of the other door in an operable door state.
Since a conventional general double sliding door device are constructed with steps formed between both doors which spoils the beauty thereof in design, plane shut double sliding doors are frequently employed. However, these double sliding doors cannot be openably moved in superposed state in a structure if there is not formed a gap between the butted inner ends of the both doors. The sliding doors cannot be completely closed in this construction. Or the doors cannot be operably moved if the butted inner ends of the both doors are not obliquely chamfered. These problems of the conventional double sliding doors cause an impossible use in an openable state and an increase in manufacture and cost.
Accordingly, a primary object of this invention is to provide a plane shut double sliding door rail device which is adapted for an outset thereof to be completely covered in an opening of a cabinet or the like to be extremely reduced in a gap between an outer wall and double sliding doors in such a manner that the double sliding doors can be fully closed without a gap between the sliding doors with only one rail without necessity of chamfering the inner ends of the doors in a readily mountable state inexpensively. This object is performed by the structure as a result of various solutions of the above-described problems and drawbacks of the conventional double sliding doors that the plane shut double sliding door drain device comprises a door rail laid on an upper wall for rightside and leftside double sliding doors and a door rail laid on a lower wall for the double sliding doors, of a door mounting frame to laterally movably guide rightside and leftside doors via runners such as rollers provided at upper and lower ends of the both rightside and leftside sliding doors, said door rails each having at both rightside and leftside thereof an oblique portion bent backwardly, a rail switching portion and a guide portion in such a manner that one door can be shifted beforehand to switch the rail.
Another object of this invention is to provide a plane shut double sliding door rail device which can stably support rightside and leftside double sliding doors via two runners provided laterally of the doors with large capability of opening the doors in such a manner that the gap between an upper wall and a lower wall of a door mounting frame can be extremely reduced in the same manner as described above in a completely closed door state without a gap so that the butted inner ends of the sliding doors are not notched in an obliquely chamfered state with only a rail in a simple structure to be readily mounted in an opening of a cabinet or the like inexpensively. This object is performed by the structure that a plane shut double sliding door rail device comprises brackets fixedly secured to the outer ends of lateral direction of double sliding doors at upper and lower ends of the rightside and leftside sliding doors, a door rail laid on an upper wall for the double sliding doors and a door rail laid on a lower wall for the double sliding doors, of a door mounting frame to laterally movably guide the double sliding doors via two runners such as rollers provided on arms extended toward the inner ends of the double sliding doors from the brackets, said door rails each having at the right - and left side parts of a central linear portion thereof an oblique portion bent backwardly, and a door reserving portion integrated backwardly in a manner substantially perpendicularly from the linear portion in such a manner that the double sliding doors can rotate forwardly at the initial time of opening the doors and the sliding doors can be moved in a superposed state at the door opening time so that the brackets and the arms can be superposed. The above and other related objects and features of the invention will be apparent from a reading of the following description of the disclosure found in the accompanying drawings and the novelty thereof pointed out in the appended claims.

Figs. 1 and 2 are plan and bottom views respectively showing the used state of double sliding door rails constructed according to the present invention;
Fig. 3 is a perspective view showing the closed state of double sliding doors on the rails of a door mounting frame;
Fig. 4 is a perspective view showing the initial state of opening the double sliding doors on the rails;
Fig. 5 is a perspective view showing the opened state of the doors on the rails;
Figs. 6 and 7 are plan and side longitudinal sectional views respectively showing the engaging structure of the rail laid on an upper wall of the door mounting frame and the upper outer end of the door;
Figs. 8 and 9 are front and side longitudinal sectional views of a rail switching portion of the door rail;
Figs. 10 and 11 are plan and side longitudinal sectional views respectively showing a guide portion of a rail.laid on the lower wall of the door mounting frame at the door rail;
Figs. 12(A), 12(B) and 12(C) are plan views sequentially showing the order of opening the doors on the rails;
Figs. 13(A), 13(B) and 13(C) are sectional views as seen from arrows taken along the lines a-a, b-b and c-c in Figs. 12(A), 12(B) and 12(C), respectively;
Fig. 14 is a longitudinal sectional side view of another embodiment of the invention;
Figs. 15 and 16 are plan and bottom views respectively showing the used states of the plan shut double sliding door rails constructed according to the present invention;
Figs. 17 and 18 are plan views sequentially showing the order of opening the doors on the rails;
Fig. 19 is a perspective view of the used state of the rails of another example of the invention;
Fig. 20 is an enlarged sectional side view as seen from an arrow along the line d-d in Fig. 18;
Fig. 21 is an enlarged longitudinal sectional side view of the used state of the rails of still another example of the invention; and
Fig. 22 is a longitudinal sectional view as seen from an arrow along the line e - e in Fig. 11.

The present invention will now be described in more detail with reference to the accompanying drawings.
As shown in Figs. 1 and 2, door rails 2 and 3 are respectively laid on upper and lower walls la and lb of a door mounting frame 1 for a cabinet or the like.
The rails 2 and 3 respectively have at the center thereof linear portions 2a and 3a for slidably guiding leftside and rightside doors 4 and 5 in parallel with the opening edge lc of the frame 1, oblique portions 2b, 2c and 3b, 3c bent backwardly at both outsides of the linear portions 2a and 3a so as to longitudinally tiltably move the doors 4 and 5 at least in the amount equal to or longer than the thickness of the door at the initial time of opening or closing the doors, rail switching portions 6 and 7 provided in the vicinity of both ends of the linear portion 2a of the door rail 2 to hang the door to be able to shift the door beforehand and openably move the door in the beforehand shifted state, and guide portions 8 and 9 in the vicinity of the both ends of the linear portion 3a on the door rail 3 to guide the doors to be able to shift the doors 4 and 5 beforehand as described above.
As shown in Figs. 1 through 5, runners 14, 15 and 16, 17 such as rollers are respectively engaged with the door rails 2 and 3 at the doors 4 and 5 at the outside ends and at the centers at fittings 10, 11 and 12, 13 projected backwardly from the upper and lower back surface ends of the doors 4 and 5 in the opening of the frame 1. The rails 2 and 3 are clamped at the frame 1 by screws or the like oppositely between the doors 4 and 5 without a gap between the opening edge lc and the doors 4 and 5 in such a manner that the mounting positions are preset.
In the above structure, the rails are provided in a projected state. However, the rails may be formed in recessed groove shape and runners may be engaged with the grooves as will be described later with respect to another embodiment of the present invention.
The rail switching portions 6 and 7 are provided to shift one door beforehand from the other door so that one door is superposed on the other door to be laterally slidable at the time of opening the doors 4 and 5 and to reversibly shift back the one door from the other door so that the doors 4 and 5 are returned to the planarly butted state to close the doors, and are also provided to guide the runners 14, 15 and 16, 17 to shift either one door 4 or 5 from the other door 5 or 4 so that either one door 4 or 5 is completely superposed to the other door 5 or 4.
The rail switching portions 6 and 7 are, as apparently shown in the concrete structure in Figs. 8 and 9, constructed to have two rail portions 19 and 20 aligned on a base plate 18 in such a manner that the base plate 18 is engaged with a guide plate 21 through dovetail tenons 22 formed at the base plate 18 and dovetail grooves 23 formed at the guide plate 21 to be slidably in a direction perpendicular to the longitudinally of the rail portions 19 and 20, the guide plate 21 is fixedly secured onto the upper wall la of the frame 1 substantially perpendicularly to the longitudinal direction of the door rail 2 laid on the upper-wall la of the frame 1 in such a manner that the rail portions 19 and 20 may be selectively disposed on the slidable base plate 18 to be able to be shifted as part of the linear portion 2a of the door rail 2 laid on the upper wall la of the frame 1.
Retainers 24, 24 for the runner 15 are stood at both rightside and leftside on the rail portion 20 on the base plate 18 to retain the runner 15 from the rail portion 20 when the door 4 or 5 is longitudinally moved, and used to slide the base plate 18 so as to shift the rail portions 19 and 20 from the linear portion 2a of the rail 2 without fail.
The fitting 11 is formed in an L shape as seen from the side, the runner 15 is, as exemplified in the drawings, rotatably journaled through the fitting llb of U-shaped section to the extended end lla extended sidewisely from the end thereof, and the runner 5 for the door 4 or 5 to be opened is guided to the rail portion 19 at the door closing time in Fig. 1 in which the other rail portion 19 is disposed to bring the linear portion la of the rail 2 coincident to the oblique portions 2b or 2c.
On the other hand, the fittings 13 which are secured fixedly to the lower centers of the doors 4 and 5 are constructed substantially in the same manner as the fitting 11, and the runner 17 is rotatably supported, as shown in Fig. 11, to a stud shaft 25 which is stood from the extended end 13a of the fitting 13.
The door rail 2 laid on the upper wall la of the door mounting frame 1 is formed substantially in a projected shape of cross section, while the door rail 3 laid on the lower wall lb is formed substantially in a recessed shape of cross section, the runners 14 and 15 of rollers are rotatably engaged with the door rail 2 at the upper end and with the door rail 3 at the lower end, and the guide portions 8 and 9 are formed substantially in T shape as seen planarly in Fig. 10.
Linear portions 8a and 9a of the respective guide portions 8 and 9 are secured fixedly to the frame 1 to form part of the rail 3 laid on the lower wall lb of the frame 1, and recessed grooves 8b and 9b of the respective guide portions 8 and 9 formed perpendicularly to the linear portion 3a of the rail 3 laid on the lower wall lb of the frame 1 are engaged with the runner 17.
The fittings 10 which are secured fixedly to the outer upper ends of the doors 4 and 5 are, as shown in Figs. 6 and 7, formed in U shape of cross section in such a manner that the runner 14 of roller is supported between the lower bent piece 10a formed at the end thereof and the mounting piece 10b formed at a predetermined interval from the piece 10a.
Further, the fittings 12 which are secured fixedly to the outer lower ends of the doors 4 and 5 are formed in L shape of cross section, a stud shaft (not shown) is stood on one end thereof, and the runner 16 of roller is rotatably supported to the stud shaft.
In Figs. 6 and 7, reference numeral 26 designate stoppers stood at both rightside and leftside ends of the rail 2 laid on the upper wall la of the frame 1 to position the closed door in contact with the runner 14.
The opening and closing operations of the double sliding doors of the plane shut double sliding door rail device of the invention thus constructed will now be described with reference to Figs. 12(A), 12(B) and 12(C) and Figs. 13 (A), 13 (B) and 13(C).
The doors 4 and 5 are, as shown in Fig. 12(A), closed in the state that the inner ends 4a and 5a thereof are butted. The doors 4 and 5 main the closed state in such a manner that the runners 14 are butted to the stoppers 26 provided on the rail ends, as shown in Fig. 6. Thus, the doors 4 and 5 are planarly disposed in the butted state at the inner ends 4a and 5a thereof. The runners 14 and 14 are engaged with the oblique portions 2b and 2c of the rail 2 in this state, while the runners 15 and 15 are engaged, as shown in Fig. 13(A), with the rail portions 20 and 20 at the rail switching portions 6 and 7.
The runners 16 and 16 are respectively engaged with the oblique portions 3b and 3c of the rail 3 laid on the lower wall.lc of the frame 1, while the runners 17 and 17 are respectively engaged with the guide portions 8 and 9, and the doors 4 and 5 are closed at the opening of the frame substantially without a gap at the opening edge lc of the frame 1.
When the door 4 of left side is, for example, opened from the above-mentioned closed state of the doors 4 and 5, a knob or the like provided on the inner end 4a of the door 4 is gripped and pulled beforehand. Then, beforehand force is applied to the rail switching portion 6 through the fitting 11 and the runner 15. Thus, the base plate 18, the rail portions 19 and 20 are shifted beforehand, as shown in Figs. 12(B) and 13(B) to bring the rail portion 20 coincident to the linear portion 2a of the rail 2 laid on the upper wall la of the frame 1, and the door 4 is rotated clockwise at the one runner 14 as a fulcrum. In this manner, the inner end 4a of the door 4 is shifted beforehand to become oblique as shown in Fig. 12(B).
'The runner 17 of roller is removed from the. guide portion 8 and shifted to the linear portion 8a of the guide portion 8 at this time.
When the door 4 is then moved rightwardly in the drawings, the runners 14, 15 and 16, 17 are guided to the rails 2 and 3 laid on the upper and lower walls of the frame 1 to move rightwardly of the drawings.
At this time the runners 15 and 17 are disposed in advance on the linear portions 2a and 3a of the rails 2 and 3, respectively. Since the other runners 14 and 16 of outside are, however, engaged with the oblique portions 2b and 3b of the rails 2 and 3, respectively, they first start in the oblique state, but rotate counterclockwise at the runners 15 and 17 as fulcra as they move rightwardly, and-when the runners 14 and 16 reach the linear portions 2a and 3a of the rails 2 and 3, respectively, the door 4 becomes in parallel with the opening edge lc of the frame 1. Thereafter, the doors are opened in the lateral state, the runners 15 are engaged, as shown in Figs. 12(C) and 13(C), with the rail portion 19 at the rail switching portion 7 shifted by the rightside door 5 immediately before the doors are fully opened and stopped. After the door 4 is further moved rightwardly, the fitting 11 makes contact with the fitting 11 of the other door 5 as shown by two-dotted broken line in Fig. 12(C), the doors are fully opened and stopped, and the door 4 is opened to be superposed with the outside of the other door 5.
The doors 4 and 5 are not completely coincident to one another in the opened door position as shown, but this is produced from the relationship of the mounting positions of the fittings 11 and 11. When they are mounted slightly from the outside of the doors, the doors 4 and 5 can be fully superposed.
When the door 4 is closed, the door 4 is moved leftwardly from the opened door state as shown in Fig. 12(C). Then, the runners 14, 15 and 16, 17 are guided to the linear portions 2a and 3a of the rails 2 and 3 to move leftwardly in the horizontal state. When one runners 14, 16 then . reach the oblique portions 2b and 3b of the rails 2 and 3, the door 4 moves while rotating clockwise, the runner 14 makes contact with the stopper 26. In this state, the door 4 becomes the state as shown in Fig. 12(B).
At this time, the other runner 15 is engaged with the rail portion 20 at the rail switching portion 6 as shown in Fig. 13(B). Thus, when the door 4 is further pushed at the inner end 4a, the base plate 18 is pushed to be shifted depthwisely through the fitting 11 and the runner 15, while the lower runner 17 is accordingly shifted depthwisely to be engaged with the guide portion 8. Thus, the door 4 is closed as shown in Fig. 12(A), and is contained in the same plane as the other door 5.
Since the door 4 is shifted forwardly at the inner end 4a obliquely at the initial time of opening the door and at the fully closed time, the door 4 may not collide with the other door 5 at the times of opening and closing the door without necessity of providing chamfered parts of the inner ends 4a and 5a of the doors 4 and 5, and the doors can be closed without a gap between the doors 4 and 5.
Further, when the other door 5 is opened and closed, the door 5 operates in the same manner as the above operation of the door 4, and the operation of the door 5 will be omitted.
Fig. 14 shows an embodiment in which the rails 2 and 3 are disposed upside down, and suitable auxiliary members la' and 1b' are respectively attached to the upper and lower walls la and lb of a door mounting frame 1 so that the upper wall la is guided and the lower wall lb.is hung.
Another embodiment of a plane shut double sliding door rail device constructed according to the present invention will now be described with reference to Figs. 15 to 22. Figs. 15 to 22 show an outset plane shut double sliding door rail device, while Figs. 21 and 22 show an inlet plane shut double sliding door rail device.
This second embodiment of the plane shut double sliding door rail device of the invention is fundamentally constructed and operated in the same manner as those of the first embodiment of the invention, wherein the same reference numerals in the second embodiments as those in the first embodiment designate equal or equivalent parts. However, in the second embodiment of the invention, door rails 2 and 3 laid on upper and lower walls of a door mounting frame are of the second embodiment of the invention are constructed differently from those of the first embodiment of the invention, and are not formed in a projected shape, but formed in a recessed state. Thus, in order to reserve runners 15 and 17 away of the door rails 2 and 3, reservoirs 2d, 2e and 3d, 3e are provided integrally with the linear portions 2a and 3a of the rails 2 and 3 instead of the rail switching portions 6 and 7, and the guide portions 8 and 9.
Further, doors 4 and 5 are disposed at the outer ends of the door mounting frame 1 laterally of the doors, the runners 15, 15 and 17, 17 of rollers are respectively provided at the back outer ends of brackets 27, 28, 29 and 30 projected backwardly from both upper and lower back ends thereof as well as at the back ends of arms 31, 32, 33 and 34 extended in parallel with the doors 4 and 5, corresponding to the extended ends lla and 13a of the fittings 11 and 13, to the inner end side of the doors 4 and 5 from the brackets 27, 29 , 29 and 30, and respectively movably engaged with the door rails 2 and 3 so that the doors 4 and 5 are mounted in the opening of the door mounting frame 1.
The runners 14 to 17 of the case that the rails 2 and 3 are formed in recessed shape may employ, as shown in Fig. 20, ball casters or, now shown, slides or rollers.
As understood from the description of the first embodiment of the invention, but the reservoirs 2d, 2e and 3d, 3e of the rails 2 and 3 will be described. The reservoirs 2d, 2e and 3d, 3e are provided to close the leftside and rightside doors 4 and 5 which are opened as described above by shifting beforehand the one door from the other so that the doors are superposed to be laterally slidable from one another or to open the doors 4 and 5 which are closed by reversibly shifting the one door depthwisely so that the doors 4 and 5 are planarly butted so as to close the doors, and to increase the opening amount of the doors by guiding the runners 15, 15 and 17, 17 of the arms 31 to 34 without butt contacting, and preventing the brackets 27, 28 and 29, 30 of the doors 4 and 5 from butt contacting due to lateral opposite movements of the runners 15, 15 and 17, 17 of the brackets of the door as shown in Fig. 18 when the arm of one door enters under the bracket of the other door so as to open the doors so that either one door 4 or 5 is shifted beforehand to be completely superposed to the other door.
Accordingly, the brackets 27, 29, 29, 30 and the arms 31, 32, 33, 34 of the leftside and rightside doors 4 and 5 are, as apparently shown in Figs. 17 and 19, at the arms 31, 32 or 33, 34, disposed in parallel with one another longitudinally so as to enter under the bracket of the other door at the door opening time.
In the concrete structure of the reservoirs 2d, 2e and 3d, 3e, as apparently shown in Fig. 19 and 20, when the linear portions 3a, 3a and the oblique portions 2b, 2c and 3b, 3c are formed in recessed groove shape, they are formed similarly in the recessed groove shape substantially perpendicularly from the linear portions 2a, 3a backwardly.
In the exemplified embodiment, the brackets 27 to 30 and the arms 31 to 24 are respectively provided at the upper and lower ends of the leftside and rightside doors 4 and 5, the runners 14, 15 and 16, 17 are respectively provided in engagement with the door rails 2 and 3, and the doors 4 and 5 are supported at the upper and lower ends. However, the invention may not always limited only to this embodiment. For example, the doors 4 and 5 may be supported only by the upper ends in a hanging type, or may be supported only by the lower ends in a sliding type, in which cases, the other ends of the doors 4 and 5 may be preferably guided so that the doors 4 and 5 are guided through fluctuation preventing means or sliding means movably along the door rail 2 to the upper or lower wall la or lb.
Figs. 21 and 22 show inset plan shut double sliding door rail device of the invention.
In this case, the door rails 2 and 3 respectively laid on upper and lower walls of a door mounting frame 1 are oppositely laid on the inner surfaces of the upper and lower walls la and lb, and the door rails 2 and 3 are formed of linear portions 2a, 3a, oblique portions 2b, 2c and 3b, 3c, and reservoirs 2d, 2e and 3d, 3e in the same manner as the above-described outset plan shut double sliding door rail device, but the oblique portions 2b, 2c and 3b, 3c are bent backwardly, the reservoirs 2d, 2e and 3d, 3e are provided integrally from the linear portions 3a and 3a substantially perpendicularly to the depthwise direction, and when the doors 4 and 5 are opened or closed, they are rotated beforehand as designated by two-dotted broken line in Fig. 11.
The doors 4 and 5 are provided at the upper and lower ends thereof with brackets 27 to 30 and arms 31, 34 on the back surfaces thereof in the same manner as the previous embodiment, also with runners 14, 15 and 16, 17 disposed outwardly in engagement with the door rails 2 and 3, respectively.
In the exemplified embodiment, the door rails 2 and 3 are formed in recessed groove shape directly on the inner surfaces of the upper and lower walls la and lb. The runners 14 to 17 employ ball casters at the lower ends thereby and rollers at the upper ends. However, the embodiment may not be always limited only to this structure. For example, the door rails 2 and 3 may be formed in a projected shape in the same manner as the first embodiment, or the runners 14 to 17 may employ slides or rollers.
Even in this cases, the brackets 27 to 30 and the arms 31 to 34 of the leftside and rightside doors 4 and 5 are provided to be superposed in the door open state.
The opening and closing operations of the double sliding doors of the plane shut double sliding door rail device of this embodiment are fundamentally carried out in the same manner as those of the first embodiment, and the device may be operated from the door closed state of butting the inner ends 4a and 5a of the doors 4 and 5 as shown in Fig. 15, to pull to shift beforehand the inner end of the door 4 as shown in Fig. 17, and then to move the door rightwardly to obtain the door open state as shown in Fig. 18. In this door open state, the arms 31, 33 of the door 4 are guided under the brackets 28, 30 provided at the rightside door 5. Thus, since the both members do not collide, the opening amount of the door 4 increases, with the result that the doors 4 and 5 are completely superposed to one another.
Even when the door 4 is closed, the above operations are reversely carried out as described above.
According to the plane shut double sliding door rail device constructed in accordance with the first embodiment of the invention as described above, the device comprises a door rail 2 laid on an upper wall la for rightside and leftside double sliding doors 4 and 5 and a door rail 3 laid on a lower wall lb for the double sliding doors, of a door mounting frame 1 to laterally movably guide rightside and leftside doors via runners 14, 15 and 16, 17 such as rollers provided at upper and lower ends of the both rightside and leftside sliding doors, said door rails 2, 3 having at both rightside and leftside thereof linear portions 2a, 3a formed at the center thereof, oblique portions 2b, 2c and 3b, 3c bent backwardly at the right and left ends of the linear portions, rail switching portions 6, 7 provided at the rail 2 at both rightside and leftside and guide portions 8, 9 provided at the rail 3 in such a manner that the doors 4 and 5 are operated at the initial time of opening the door so that the doors 4, 5 are tiltably moved from one another forwardly to be shifted to be superposed from one another. Thus, the leftside and rightside doors 4 and 5 can be superposed via the door rail 2 laid on the upper wall and the door rail 4 laid on the lower wall of the rail mounting frame, and the doors 4 and 5 are forwardly tilted at the door closed position so that the inner ends 4a and 5a of the doors 4 :. and 5 do not interfere with one another. Accordingly, it is not necessary to chamfer the inner ends 4a and 5a of the doors, nor needed to provide a gap between the doors 4 and 5 in a readily mountable state inexpensively.
Since the rail switching portions 6, 7 provided at both rightside and leftside of the door rail 2 are provided to guide the runners 15 of the other door, the doors 4 and 5 can be completely superposed so as to open the doors, extremely small gap may be provided between the opening. edge lc of the rail mounting frame in the closed door state, and the doors 4 and 5 can be fully closed in a completely closed door state without a gap between the doors 4 and 5.
According to the plane shut double sliding door rail device of the second embodiment in accordance with the invention as described above, the device comprises brackets 27, 28 and 29, 30 fixedly secured to the outer ends of lateral direction of double sliding doors at upper and lower ends of the rightside and leftside sliding doors 4 and 5, a door rail 2 laid on an upper wall la for the double.sliding doors and a door rail 3 laid on a lower wall lb for the double sliding doors, of a door mounting frame 1 to laterally movably guide the double sliding doors via two runners 14, 15 and 16, 16 such as rollers provided on arms 31, 32, 33, 34 extended toward the inner ends of the double sliding doors from the brackets 27 to 30, said door rails 2, 3 having at the center linear portions 2a, 3a for moving the doors 4 and 5 in parallel with each other, at the right and left side parts of central linear portion thereof oblique portions 2b, 2c and 3b, 3c bent backwardly to be tiltably at the runners 14, 14 and 16, 16 as fulcra at the outer ends of the doors at the door opening or closing time of the doors 4 and 5, and rail reserving portions 2d, 2e and 2d, 3e integrated with the vicinity of the linear portions at both sides in such a manner that-the double sliding doors can rotate and slide forwardly at the time of opening and closing so as to guide the runners 15, 15 and 17, 17 of the arms 31, 32, 33, 34 at the inner ends of the doors longitudinally of the doors so that the brackets 27 to 30 and the arms 31 to 34 of the doors 4 and 5 are superposed in the door open state, it is not necessary to chamfer the back surfaces of the inner ends 4a, 5a of the doors 4 and 5, nor to form a gap between the doors 4 and 5, and the doors can be moved in a superposed state via one rail 2 and one rail 3 laid on the upper and lower walls of the rail mounting frame at the door opening time, the doors 4 and 5 can be readily mounted simply inexpensively. Further, since the rail reserving portions 2d, 2e and 3d, 3e are particularly provided at the rightside and leftside of the linear portions 2a and 3a of the rails 2 and 3 so that the runners 15, 15 and 17, 17 of the arms 31 to 34 are detachable at the door opening or closing time and the doors 4 and 5 are closed in a planar state in such a manner that the runners 15, 15 and 17, 17 are engaged with the reserving portions 2d, 2e and 3d, 3e. Thus, even if the arms 31 to 34 are extended to the vicinity of the inner ends 4a, 5a of the doors 4 and 5 so that the runners 15, 15 and 17, 17 are provided at the ends, no interfere occurs between the arms 31, 32 and 33, 34 of the doors 4 and 5, between the arms 31 to 34 and the brackets 27 to 30, and further between the brackets 27, 28 and 29, 30 at the door opening and closing times, and further the arms 31 to 34 are guided under the brackets 27 to 30 at the door opening time, the door opening amount of the doors 4, 5 are increased. Thus, the doors 4, 5 can be completely superposed in the open state. In this manner, when the opening is thus increased in the doors 4, 5, articles can be preferably introduced into or exhausted from the interior of a cabinet or the like. Moreover, since the doors 4, 5 can be supported by two runners 14, 15 or 16, 17 in fully lateral width of the doors 4, 5, the doors can be stably supported without lateral and longitudinal fluctuations even if considerably large and heavy doors are employed.

Claims

1. A plane shut double sliding door rail device comprising one door rail laid on an upper wall of a rail mounting frame and the other door rail laid on a lower wall of the door mounting frame to laterally movably guide rightside and leftside doors via runners such as rollers provided at upper and lower ends of the both rightside and leftside sliding doors, said door rails having linear portions formed at the center thereof, at both side ends of the linear portion oblique portions bent backwardly at the right and left ends of the linear portions to prevent an interfere between the both doors at both ends thereof at the opening or closing time or tilting time, rail switching portions provided at both rightside and leftside of said rails, engaged with said runners in such a manner that one door is tiltable to the other door beforehand at least in the amount thicker than the thickness of the door and guide portions for said runners.

2. The plane shut double sliding door rail device as claimed in claim 1, wherein said rail switching portions comprises a base plate, on which two rails are aligned on the upper surface thereof, and a guide plate slidably engaged with said base plate.

3. A plane shut double sliding door rail device comprising brackets fixedly secured to the outer ends of lateral direction of double sliding doors at upper and lower ends of the rightside and leftside sliding doors, one door rail laid on an upper wall of a rail mounting frame and the other door rail laid on a lower wall of the rail mounting frame to laterally movably guide the double sliding doors via two runners such as rollers provided on arms extended toward the inner ends of the double sliding doors from the brackets, said door rails having at the center linear portions for moving the doors in parallel with each other, at the right and left side parts of central linear portion thereof oblique portions bent backwardly to be tiltably at the runners as fulcra at the outer ends of the doors at the door opening or closing time of the doors, and rail reserving portions integrated with the vicinity of the linear portions at both sides in such a manner that the double sliding doors can rotate and slide forwardly at the time of opening and closing so as to guide the runners of the arms at the inner ends of the doors longitudinally of the doors so that the brackets and the arms of the doors are superposed in the door open state.

4. The plane shut double sliding door rail device as claimed in claim 3, wherein said rail reserving portions of the door rails are formed in recessed groove shape perpendicularly in communication with the linear portions formed in a recessed groove shape.